100% non-profit — all proceeds support human writing & creative initiatives
Prove your work
was made by a human.
Record your screen and webcam while you create. Receive a signed Certificate of Authenticity with a public ID anyone can verify — completely free.
01
Record
Capture your screen and webcam simultaneously while you work.
02
Certify
A unique CERT-XXXX-XX ID is generated and signed into the registry.
03
Verify
Anyone can confirm authenticity by entering the ID — no account needed.
Your footage is yours.
Recordings are stored privately. Only you can access them. The public registry only ever exposes the project name, date, and verified status.
Support the mission
Bio Mark is a fully non-profit initiative. Every donation goes directly toward supporting human writing, creative arts, and initiatives that protect authentic human expression in the digital age.